code: def testBasic1(self):
      x = [1, 2, 3, 4]
      y = [1, 2]
      out = [3, 4]
      idx = [2, 3]
      self._testListDiff(x, y, out, idx)
  
file_path: tensorflow/tensorflow/python/kernel_tests/data_structures/listdiff_op_test.py
imports: import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 2 for calling the ListDiffTest obj's underlying member method code with example usage: obj.testBasic1() without return types